OBJECTIVES To describe a standard clinical protocol for the objective assessment of manual wheelchair propulsion; to establish preliminary values for temporal and kinetic parameters derived from the protocol; and to develop graphical references and a proposed application process for use by clinicians. DESIGN Case series. SETTING Six research institutions that collect kinetic wheelchair prop...

Fine multifunctional prosthetic hand manipulation requires precise control on the pinch-type and corresponding force, it is a challenge to decode both aspects from myoelectric signals. This paper proposes an attribute-driven granular model (AGrM) under machine-learning scheme solve this problem. The utilizes additionally captured attribute as latent variable for supervised granulation procedure...

i Abstract This thesis sought to: 1) examine the effect of a number of organism and task constraints on the control of two forms of physiological tremor, namely postural and finger-pinch force tremor; and 2) determine if the expected constraint-related changes in tremor output were associated with alterations in the control strategy utilised by the performer. The organism constraints were age a...

The complex hydrodynamics of water entry by a spinning sphere are investigated experimentally for low Froude numbers. Standard billiard balls are shot down at the free surface with controlled spin around one horizontal axis. High-speed digital video sequences reveal unique hydrodynamic phenomena which vary with spin rate and impact velocity. As anticipated, the spinning motion induces a lift fo...

We present a mathematical model and analysis for the pinch-off transition as observed in dip-coating experiments at the base of thin liquid films driven up a vertical plate by a thermally induced surface tension gradient with a counteracting gravitational force. Our results show that this transition gives rise to a complex new wave structure involving a nonclassical, reverse undercompressive sh...

in the aftermath of the 1994 northridge, california, earthquake. a significant number of steel moment resisting structural systems were damaged. many studies and researches have been conducted to improve the seismic performance of structures after the catastrophe. one of the proposed connections for special moment-resisting frames included aisc-358 is kaiser bolted bracket moment connection, br...

The recent work of Gharib, Rambod, and Shariff @J. Fluid Mech. 360, 121 ~1998!# studied vortex rings formed by starting jets generated using a piston-cylinder mechanism. Their results showed that vortex rings generated from starting jets stop forming and pinch off from the generating jet for sufficiently large values of the piston stroke to diameter ratio (L/D), suggesting a maximization princi...

OBJECTIVE The objective was to evaluate the effect of wrist posture on incidence of wrist tendinosis in a prospective cohort of blue-collar workers. BACKGROUND Previous studies have identified awkward wrist posture as a risk factor for wrist tendinosis, though the magnitude of the relationship is unclear. METHOD Workers (N = 413) at four industries were followed for up to 28 months with que...

Musculoskeletal Disorders (MSDs), especially those of the upper limb are a common concern in modern industry, and physical risk factors such as force and posture are linked to their causation. The effects of the combination of forceful gripping or grasping (especially pinch grips) and awkward postures should be considered in the causation of MSDs. Current guidelines recommend that wherever poss...

OBJECTIVE A commonly adhered to operating principle in occupational therapy clinics is that a person must exhibit 20 lb of grip strength before his or her hand is considered "functional." This study examined the relationship between hand and finger grip performances with the forces required to open common household containers. METHOD The grip and pinch strengths of 49 college students were ob...